Level



HABEL.

LEVEL.

(No Model.)

No. 523,205. Patented July 17, 1894.

W 1% 21mm U ITED STATES JACOB HABEL, OF MINNEAPOLIS, MINNESOTA.

LEVEL.

SPECIFICATION forming part of Letters Patent No. 523,205, dated July 17, 1894.

Application filed February 9, 1894. Serial No. 499|574- N0 model.)

To all whom it may concern:

Be it known that I, J AOOB HABEL, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Levels; and I do hereby do clare the following to be a full, clear, and exact description of the invention, such as will en able others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved level, for use by artisans and others, such as masons, carpenters, &c.

To this end, the invention consists of certainnovel devices and combinations of devices, which will be hereinafter fully described and defined in the claims.

In the accompanying drawings, like letters referring to like parts,Figure 1 is a side elevation of my improved level, with some parts broken away, and others shown in section. Fig. 2 is a plan view of the level. Fig. 3 is a detail, partly in side elevation and partly in vertical section, with some parts broken away, showing the construction and mounting of the tube, which I employ for measuring and indicating angular projections. Fig. 4 is a detail in cross section, on the line it-t of Fig. 3; and Fig. 5 is a detail showing the concave face of the plumb line bubble tube.

a represents the body or stock of the level, which maybe of any suitable construction. I) represents the horizontal leveling tube, pivoted at one end, as shown at b to a rectangular open frame 19 which is centrally mounted in the body of the level. The other end of the tube b is adj ustably supported by a wrenchheaded rod b having a screw threaded engagement with the tube, and working with its lower end against a suitable seat 19 in the frame 12 and with its upper end held against upward longitudinal movement in a counterbored nut b resting in a countersunk seat in the body of the level and having screwthreaded engagement at its lower end with the frame W, as shown at b The nut b is provided with a slot or slots 12 in its head, for insertion in and removal from working 'position. The adjusting rod b is adapted to be operated by an ordinary wrench-headed key, not shown. It is obvious, that with this construction the horizontal tube 1) may be accurately adjusted for its work of indicating the horizontal level.

Near the left end of the level is located the vertical or plumb line tube 0, which is pivoted, as shown at c to base-piece c removably secured to the body of the level by lag-screws c or in any other suitable way. At its upper end, the vertical tube 0 is subject to the cooperative action of a spring 0 and a conical cam-headed rod 0 both of which parts are seated in a removable cap cflscoured by lagscrews c or otherwise, in the body of the level. The spring 0 is loose and is held from displacement here it bears on the tube bya lug o projecting inside the spring from the tip of the tube. The upper end of the tube 0 is beveled on the surface thereof opposite the spring 0 as shown at c", The conical cam c bears against the beveled surface 0 and the stem of the cam-rod has screwrthreaded engagement with the cap 0 as shown at 0 and is wrench headed at its upper end, for operation by the same key, which is applicable to operate the rod b, for the horizontal tube. The tube 0 extends across the ordinary sight-opening o With this construction, it is obvious, that the spring 0 will tend to throw the top of the tube 0 toward the right as far as permitted by the cam 0 and that by turning the cam 0 in its screw-threaded seat, the longitudinal movement thereof may be made to move the top. of the tube 0 toward the left against the spring 0 Hence, by adjusting the said cam-rod or screw 0 the Ver: tical tube a may be set as required, to indicate the plumb line.

Near the right end of the level is located a tube at capable of endwise rotary motion, and therefore applicable to indicate angles or angular projections, with respect to the horizontal plane. As shown, the tube at is carried in an annulus d, mounted with freedom for rotary motion in a suitable case (1 secured to the body of the level. The annulus d has cut on its periphery worm gear teeth d which adjusting rod d The rod d bears at its lower end against a suitable seat (1 in the case (1 and is held against upward longitudinal movement by a counterbored nut (1 having screwthreaded engagement with the case 01 as shown at 02 The face of the annulus is graduare engaged by a worm d on wrench-headed ated to indicate circular measure, as clearly shown in Figs. 1 and 3, and moves by a fixed pointer or indicating lllalk d on the case d The graduations on the face of the annulus d, are arranged so that when the tube at is horizontal, the zero mark on the dial plate or annulus d willbe directly under the pointer or indicator mark (1"; and hence, whenever the tube is rotated endwise in either direction therefrom, the angle or angular projection may be at once read from the number of de grees indicated on thedial oppositethe'pointer.

d. The head of the adjusting rod (1 is adapted for operation by the same key used "for the rod b and the cam-screw 0 With this construction and mountingof the tube (2, it is obvious that it may be rotated at will, in its seat and be set, so as to indiceteany angular projection desired, with respect to the horizontalplane. In otherwords, when the tube at is set for the desired angle, the bubble therein will be read at the sight opening and the tube be in the horizontal position, when the'body of the level is set at the required angular projection. This device for indicating angles and angular projections isagreat convenience in a level, for masons, carpenters and other artisans use. This angle tube (1 is the most important feature of my invention. The nut 01 is provided with slots d for the application of a screw-driver, in the sameway as the nut 6 'I he'face of the beveled surface 0 on the upper end of the plumb line tubec is concave in cross section, as shown in Fig. 5; and, hence,

the conical cam 0 will hold the tubecentral therewith.

What I claim and desire to secure by Lettors Patent of the United States, is as follows:

1. In a level, the combination with the bubble tube d,annulus (1", case 01 gear-teeth d and the worm d of the rod d seated in the case 01 and the nut d all arranged and operating substantially as described.

2. In alevel, the combination with the pivr oted tube 0, having the lug and the beveled surface 0", of the spring 0 conical-headed cam-screw 0 and the cap 0 all arranged and operating substantially as described.

3. In alevel, the combination with the hori- 5o zontal leveling bubble-tube b,pivoted atone end, of the adjusting rod 72 having screw threaded engagement with the free *end -of said tube 1), and held against longitudinal movement by the nut bi, snbstantially as described. I

4. In a level, the combination with the hubble tube, of a rotary screw or worm, for :adjusting the same, and a counterbored mu't, having screw-threaded engagementwith some fixed part of the level, for holding the rod againstlongitudinal movement, substantially as described.

In testimony whereof Iaffixmy signature in presence of two'witnesses.

JACOB H'A 'BEL.

Witnesses:

Josm HABEL, .TAs. F. WILLIAMSON. 

